I think this too. It has the same pattern, many "compelling" brand sites got a boost again. -lost all the keys that we are good in and whats our Business. only some very obscure keys are left. Bounce rate is more than 90% again ( went up from less than 20% ). Its Panda and his son now.
According to sourroundtablenews, Google said they didnīt change anything. HA!